Company · Ownership research

ARGENX SE ARGX

CIK 0001697862 · CUSIP 04016X101

Insider tradingInitial holdingsInstitutional holders

Quarter-end disclosures, not live holdings.

Several CUSIPs are reported for this company; this page shows CUSIP 04016X101 (ARGX), not CUSIP 04016X901 (ARGX), CUSIP 04016X951 (ARGX), CUSIP N0610Q109 (ARGNF), and does not merge CUSIPs.

This page lists the top 20 of 336 rows by value; the complete set is available through the API.

Some filings reported values in thousands; those figures were scaled ×1,000 to dollars.

Top 20 institutions

Weight means this stock's share of the manager's own portfolio.

By reported value

#	Manager	Value	Manager weight	Change vs prior	Source
01	PRICE T ROWE ASSOCIATES INC /MD/ CIK 80255 · View history	$2.41B 5,598,563 shares	0.29%	+94.06K(+1.70%)Added	SEC filing ↗ Aug 14, 2024	▾
02	FMR LLC CIK 315066 · View history	$1.52B 3,527,986 shares	0.10%	+257.96K(+7.90%)Added	SEC filing ↗ Aug 13, 2024	▾
03	Artisan Partners Limited Partnership CIK 1466153 · View history	$1.51B 3,511,078 shares	2.30%	+321.48K(+10.10%)Added	SEC filing ↗ Aug 12, 2024	▾
04	JANUS HENDERSON GROUP PLC CIK 1274173 · View history	$1.06B 2,468,232 shares	0.57%	+251.58K(+11.30%)Added	SEC filing ↗ Aug 14, 2024	▾
05	T. Rowe Price Investment Management, Inc. CIK 1897612 · View history	$827.70M 1,924,712 shares	0.52%	-190.77K(-9.00%)Reduced	SEC filing ↗ Aug 14, 2024	▾
06	Capital World Investors CIK 1422849 · View history	$650.11M 1,511,494 shares	0.11%	-353.10K(-18.90%)Reduced	SEC filing ↗ Aug 13, 2024	▾
07	Avoro Capital Advisors LLC CIK 1633313 · View history	$532.59M 1,238,467 shares	7.09%	0(0.00%)Unchanged	SEC filing ↗ Aug 14, 2024	▾
08	BlackRock Inc. CIK 1364742 · View history	$434.90M 1,011,291 shares	0.01%	-36.00K(-3.40%)Reduced	SEC filing ↗ Aug 13, 2024	▾
09	MORGAN STANLEY CIK 895421 · Amended · View history	$352.57M 819,841 shares	0.03%	+125.96K(+18.20%)Added	SEC filing ↗ May 14, 2025	▾
10	Bellevue Group AG CIK 1674546 · View history	$297.53M 691,874 shares	4.83%	-119.14K(-14.70%)Reduced	SEC filing ↗ Aug 14, 2024	▾
11	RTW INVESTMENTS, LP CIK 1493215 · View history	$281.43M 654,430 shares	4.36%	-12.77K(-1.90%)Reduced	SEC filing ↗ Aug 14, 2024	▾
12	CITADEL ADVISORS LLC CIK 1423053 · View history	$280.85M 653,090 shares	0.28%	+540.81K(+481.70%)Added	SEC filing ↗ Aug 14, 2024	▾
13	Clearbridge Investments, LLC CIK 1348883 · Amended · View history	$265.54M 617,466 shares	0.22%	+21.19K(+3.60%)Added	SEC filing ↗ Aug 27, 2024	▾
14	Paradigm Biocapital Advisors LP CIK 1855655 · View history	$231.42M 538,139 shares	8.86%	-13.98K(-2.50%)Reduced	SEC filing ↗ Aug 14, 2024	▾
15	WELLINGTON MANAGEMENT GROUP LLP CIK 902219 · View history	$183.51M 426,729 shares	0.03%	+150.56K(+54.50%)Added	SEC filing ↗ Aug 14, 2024	▾
16	Holocene Advisors, LP CIK 1700574 · View history	$183.03M 425,614 shares	0.76%	-63.19K(-12.90%)Reduced	SEC filing ↗ Aug 14, 2024	▾
17	Deep Track Capital, LP CIK 1856083 · View history	$172.02M 400,000 shares	5.14%	+100.00K(+33.30%)Added	SEC filing ↗ Aug 14, 2024	▾
18	SEI INVESTMENTS CO CIK 350894 · View history	$164.08M 381,544 shares	0.23%	+50.48K(+15.20%)Added	SEC filing ↗ Aug 13, 2024	▾
19	Pictet Asset Management Holding SA CIK 1993888 · View history	$132.53M 308,176 shares	0.15%	-20.99K(-6.40%)Reduced	SEC filing ↗ Aug 13, 2024	▾
20	ALKEON CAPITAL MANAGEMENT LLC CIK 1230239 · View history	$129.01M 300,000 shares	0.66%	+300.00KNew	SEC filing ↗ Aug 14, 2024	▾

Showing 20 / 336 institutions. The complete set is available through the API.

Coverage & totals by quarter

Reporting institutions

336

Cancelled or null records excluded

Disclosed shares

34,273,836

Not deduplicated across managers

Disclosed value

$14.74B

Not market cap or free float

Reporting institutions by quarter

Counts also change with data coverage and reporting entities; they do not measure net buying. Distinct managers with a live stock row in this CUSIP; totals may include overlapping filings and are not a share of the company.

ARGENX SE · Q2 2024

Explore all 336 reporting institutions.

This page includes 20 of 336 reporting institutions. Log in to look up the full history beyond 3 years, use advanced screening & filtering, download CSV, and get the complete set through the Akkru API.

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Sources, coverage & how to read this data

Figures are as reported to the SEC and merged with later amendments where Akkru could match them. Preview limits apply to what is listed, not to the totals, which come from the complete reported data. Nothing is zero-filled: a missing quarter or month is shown as missing.